I am satisfied of Groove Agent but what may me cause to migrate to Superior or Ez drummer is this function stated in their site
FIND & GET
YOUR GROOVE DOWN.
Tap your rhythm directly into EZdrummer 2 and have the program list the closest matches!”
this is definitely a huge time saver and you can avoid to browse hours on the different kits and style, just type the rhythm, and the program show you all the kits that have rhytms with similar accents. I really don’t want to buy another program and I hope you can add this feature to Groove Agent, I think is quite a simple thing, it is just a search function but would make Groove Agent much more attractive